<template>
  <el-card>
    <div slot="header">
      <el-steps :active="activeStep" simple>
        <el-step
        v-for="(item, i) in steps"
        :key="item.id"
        :title="item.title"
        :icon="item.icon"
        @click.native="activeStep = i"></el-step>
      </el-steps>
    </div>
    <!-- 步骤对应的表单结构 -->
    <el-form label-width="80px">
      <!-- 基本信息 -->
      <div v-show="activeStep === 0">
        <el-form-item label="课程名称">
          <el-input v-model="course.courseName"></el-input>
        </el-form-item>
        <el-form-item label="课程简介">
          <el-input v-model="course.brief"></el-input>
        </el-form-item>
        <el-form-item label="课程概述">
          <el-input
          v-model="course.previewFirstField"
          placeholder="概述1"
          style="width: 48%; min-width: 300px; margin-right: 15px">
            <template slot="append">{{ course.previewFirstField.length }}/20</template>
          </el-input>
          <el-input
          v-model="course.previewSecondField"
          placeholder="概述2"
          style="width: 48%; min-width: 300px">
            <template slot="append">{{ course.previewSecondField.length }}/20</template>
          </el-input>
        </el-form-item>
        <el-form-item label="讲师姓名">
          <el-input v-model="course.teacherDTO.teacherName"></el-input>
        </el-form-item>
        <el-form-item label="讲师简介">
          <el-input v-model="course.teacherDTO.description"></el-input>
        </el-form-item>
        <el-form-item label="课程排序">
          <el-input-number
          lable="描述文字"
          controls-position="right"
          v-model="course.sortNum"></el-input-number>
        </el-form-item>
      </div>
      <!-- 课程封面 -->
      <div v-show="activeStep === 1">
        <!-- 上传图片子组件 -->
        <course-image
        v-model="course.courseListImg"
        label="课程封面"></course-image>
        <course-image
        v-model="course.courseImgUrl"
        label="解锁封面"></course-image>
      </div>
      <!-- 销售信息 -->
      <div v-show="activeStep === 2">
        <el-form-item label="售卖价格">
          <el-input
          type="number"
          v-model="course.discounts"
          :min="0">
            <template slot="append">元</template>
          </el-input>
        </el-form-item>
        <el-form-item label="商品原价">
          <el-input
          type="number"
          v-model="course.price"
          :min="0">
            <template slot="append">元</template>
          </el-input>
        </el-form-item>
        <el-form-item label="销量">
          <el-input
          type="number"
          v-model="course.sales"
          :min="0">
            <template slot="append">单</template>
          </el-input>
        </el-form-item>
        <el-form-item label="活动标签">
          <el-input
          v-model="course.discountsTag"></el-input>
        </el-form-item>
      </div>
      <!-- 秒杀信息 -->
      <div v-show="activeStep === 3">
        <el-form-item label="限时秒杀开关" label-width="120px">
          <el-switch
          v-model="course.activityCourse"
          active-color="#13ce66"
          inactive-color="#ff4949"></el-switch>
        </el-form-item>
        <template v-if="course.activityCourse">
          <el-form-item label="开始时间">
            <el-date-picker
            v-model="course.activityCourseDTO.beginTime"
            type="datetime"
            placeholder="选择开始时间"></el-date-picker>
          </el-form-item>
           <el-form-item label="结束时间">
            <el-date-picker
            v-model="course.activityCourseDTO.endTime"
            type="datetime"
            placeholder="选择结束时间"></el-date-picker>
          </el-form-item>
          <el-form-item label="秒杀价">
            <el-input
            type="number"
            v-model="course.activityCourseDTO.amount"
            :min="0">
              <template slot="append">元</template>
            </el-input>
          </el-form-item>
          <el-form-item label="秒杀库存">
            <el-input
            type="number"
            v-model="course.activityCourseDTO.stock"
            :min="0">
              <template slot="append">个</template>
            </el-input>
          </el-form-item>
        </template>
      </div>
      <!-- 课程详情 -->
      <div v-show="activeStep === 4">
        <el-form-item label="课程详情">
          <text-editor v-model="course.courseDescriptionMarkDown"></text-editor>
        </el-form-item>
        <el-form-item label="是否上架">
          <el-switch
          v-model="course.status"
          active-color="#13ce66"
          inactive-color="#ff4949"
          :active-value="1"
          :inactive-value="0"></el-switch>
        </el-form-item>
        <el-form-item>
          <el-button
          type="primary"
          @click="handleSave">保存</el-button>
        </el-form-item>
      </div>
      <el-form-item v-if="activeStep !== steps.length - 1">
        <el-button @click="activeStep++">下一步</el-button>
      </el-form-item>
    </el-form>
  </el-card>
</template>

<script>
import CourseImage from './CourseImage'
import { saveOrUpdateCourse, getCourseId } from '@/services/course'
import TextEditor from '@/components/TextEditor'

export default {
  name: 'CreateOrEdit',
  props: {
    isEdit: {
      type: Boolean,
      default: false
    },
    courseId: {
      type: [String, Number]
    }
  },
  components: {
    CourseImage,
    TextEditor
  },
  data () {
    return {
      activeStep: 0,
      steps: [
        { id: 1, title: '基本信息', icon: 'el-icon-edit' },
        { id: 2, title: '课程封面', icon: 'el-icon-upload' },
        { id: 3, title: '销售信息', icon: 'el-icon-edit' },
        { id: 4, title: '秒杀信息', icon: 'el-icon-edit' },
        { id: 5, title: '课程详情', icon: 'el-icon-edit' }
      ],
      // 图片地址
      imageUrl: '',
      // 保存和编辑信息
      course: {
        // id: 0,
        courseName: '',
        brief: '',
        teacherDTO: {
          // id: 0,
          // courseId: 0,
          teacherName: '',
          teacherHeadPicUrl: '',
          position: '',
          description: ''
        },
        // 课程详情
        courseDescriptionMarkDown: '<h3>默认值</h3>',
        price: 0,
        discounts: 0,
        priceTag: '',
        discountsTag: '',
        isNew: true,
        isNewDes: '',
        // 课程封面地址
        courseListImg: '',
        // 解锁封面地址
        courseImgUrl: '',
        sortNum: 0,
        previewFirstField: '',
        previewSecondField: '',
        status: 0,
        sales: 0,
        // 秒杀开关
        activityCourse: false,
        activityCourseDTO: {
          beginTime: '',
          endTime: '',
          amount: 0,
          stock: 0
        },
        autoOnlineTime: ''
      }
    }
  },
  methods: {
    // 保存按钮
    async handleSave () {
      const { data } = await saveOrUpdateCourse(this.course)
      if (data.code === '000000') {
        this.$message.success(`${this.isEdit ? '编辑成功' : '添加成功'}`)
        this.$router.push({
          name: 'course'
        })
      }
    },
    // 编辑功能
    async loadCourse () {
      const { data } = await getCourseId(this.courseId)
      if (data.code === '000000') {
        if (!data.data.activityCourse) {
          data.data.activityCourseDTO = {
            beginTime: '',
            endTime: '',
            amount: 0,
            stock: 0
          }
        }
        this.course = data.data
      }
    }
  },
  created () {
    // 检测是否为编辑功能
    if (this.isEdit) {
      this.loadCourse()
    }
  }
}
</script>

<style lang='scss' scoped>
.el-step {
  cursor: pointer;
}
</style>
